PMID- 31493876
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200224
IS  - 1879-2022 (Electronic)
IS  - 0019-0578 (Linking)
VI  - 97
DP  - 2020 Feb
TI  - Fixed-time near-optimal control for repointing maneuvers of a spacecraft with 
      nonlinear terminal constraints.
PG  - 401-414
LID - S0019-0578(19)30315-5 [pii]
LID - 10.1016/j.isatra.2019.07.026 [doi]
AB  - Repointing maneuvers of a spacecraft in staring mode are investigated where the 
      optical axis is required to align with the target orientation. Different from 
      traditional three-axis reorientation maneuvers, the rotation about the optical 
      axis is free of constraints for repointing maneuvers. Both static target 
      observation and moving target detection constraints are considered. The problem 
      is then formulated as a finite-time horizon optimal control problem with 
      nonlinear terminal constraints. A simple and efficient state-dependent Riccati 
      equation(SDRE) based dynamic programming approach is applied to tackle this 
      nonlinear optimal control problem. The convergence of the attitude from initial 
      conditions to the desired terminal constraint is rigorously proved for the first 
      time. Considering the inability of the SDRE method to deal with the problem of 
      large angle maneuvers, an improved SDRE approach combined with a waypoint is 
      proposed to enhance control performance. Finally, numerical investigations are 
      conducted and compared with the real optimal solutions obtained by using the 
      optimization software.
CI  - Copyright (c) 2019 ISA. Published by Elsevier Ltd. All rights reserved.
FAU - Geng, Yuanzhuo
AU  - Geng Y
AD  - Department of Control Science and Engineering, Harbin Institute of Technology, 
      Harbin, 150001, China. Electronic address: gengyz@hit.edu.cn.
FAU - Li, Chuanjiang
AU  - Li C
AD  - Department of Control Science and Engineering, Harbin Institute of Technology, 
      Harbin, 150001, China.
FAU - Guo, Yanning
AU  - Guo Y
AD  - Department of Control Science and Engineering, Harbin Institute of Technology, 
      Harbin, 150001, China. Electronic address: guoyn@hit.edu.cn.
FAU - Biggs, James D
AU  - Biggs JD
AD  - Department of Aerospace Science and Technology, Politecnico di Milano, 20156 
      Milan, Italy.
LA  - eng
PT  - Journal Article
DEP - 20190730
PL  - United States
TA  - ISA Trans
JT  - ISA transactions
JID - 0374750
SB  - IM
OTO - NOTNLM
OT  - Fixed-time optimal control
OT  - Repointing maneuver
OT  - SDRE method
OT  - Waypoint
COIS- Declaration of Competing Interest No author associated with this paper has 
      disclosed any potential or pertinent conflicts which may be perceived to have 
      impending conflict with this work. For full disclosure statements refer to 
      https://doi.org/10.1016/j.isatra.2019.07.026.
EDAT- 2019/09/09 06:00
MHDA- 2019/09/09 06:01
CRDT- 2019/09/09 06:00
PHST- 2019/03/15 00:00 [received]
PHST- 2019/06/24 00:00 [revised]
PHST- 2019/07/20 00:00 [accepted]
PHST- 2019/09/09 06:00 [pubmed]
PHST- 2019/09/09 06:01 [medline]
PHST- 2019/09/09 06:00 [entrez]
AID - S0019-0578(19)30315-5 [pii]
AID - 10.1016/j.isatra.2019.07.026 [doi]
PST - ppublish
SO  - ISA Trans. 2020 Feb;97:401-414. doi: 10.1016/j.isatra.2019.07.026. Epub 2019 Jul 
      30.